App Dev Worksheet: Final Test

App development lesson 24: App development final test · Set 547 · 40 questions

Developer's tip (Plan, design, build, check): Find the topic: what apps are, designing apps, or logic and building. Read every screen, list or code line carefully, top to bottom. For code, write each value down step by step and check it again.

1. 1.🧩 Which of these is a button on this screen?
   [title] Order Snacks
   [slider] Text size
   [text box] Phone
   [button] Done
   [text box] Subject
   [text box] Due date (a) Due date (b) Subject (c) Phone (d) Done
2. 2.💡 After a survey, which need should version 1 solve? (a) a random need (b) the most common need (c) the rarest need (d) the newest trend
3. 3.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 15; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
4. 4.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
   line 1: let coins = 37; // start at 37
   line 2: coins = coins - 4; // take away 4
   line 3: coins = coins + 2; // double it
   line 4: coins = coins + 2; // add 2
   line 5: show(coins); // show it
5. 5.True or false: a medicine reminder solves a real problem. (a) False (b) True
6. 6.🧰 How do you run (call) a function called greet? (a) greet() (b) #greet (c) run greet (d) greet[]
7. 7.🔀 What number does this shop app show?
   let total = 370;
   if (total > 500) {
     total = total - 50;
   }
   show(total);
8. 8.🧭 Where is a tab bar usually placed in a phone app? (a) at the bottom (b) inside a button (c) nowhere (d) in the middle
9. 9.🧰 What number does this code show?
   function total(price, qty) {
     return price * qty;
   }
   show(total(45, 2));
10. 10.🗒️ You are planning version 1 of a pocket-money tracker. Which feature is a MUST-HAVE? (a) export to a file (b) pie-chart colours (c) savings stickers (d) add money spent
11. 11.💾 Where should the app save photos on two devices: on the phone or in the cloud? (a) on the phone (b) in the cloud
12. 12.👆 The user taps the button 3 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    }; (a) OFF (b) ON
13. 13.💡 Which app idea solves this problem: a patient misses doses? (a) a medicine reminder (b) a study-room finder (c) a bill splitter (d) a homework planner
14. 14.🔐 Is this permission request fair or too much: timer → your photos? (a) too much (b) fair
15. 15.⚙️ What number does this app show?
    let bill = 136; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
16. 16.Which of these is processing? (a) tapping a button (b) a beep sound (c) speaking a command (d) working out a tip
17. 17.🔐 Which permission does a party-invite app for friends really need? (a) the camera (b) contacts (c) the microphone (d) location
18. 18.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) processing (c) input
19. 19.Which of these happens at the plan stage? (a) add the buttons (b) write the store text (c) sketch the screens (d) spot a problem to solve
20. 20.📱 Which one has a web address: an app or a website? (a) an app (b) a website
21. 21.📊 Survey: which problem bugs you most? How many more votes did “no quiet study place” get than “missing the bus”?
    missing the bus: 4 votes
    forgetting homework: 3 votes
    no quiet study place: 6 votes
22. 22.True or false: a lost-and-found board solves no real problem. (a) False (b) True
23. 23.👆 What kind of event is this: a countdown hits zero? (a) a timer event (b) a text event (c) a load event (d) a tap event
24. 24.🛠️ At which stage do you share the download link? (a) the release stage (b) the idea stage (c) the plan stage (d) the test stage
25. 25.🔢 In a food-order flow, which comes first: “open the menu” or “track the order”? (a) track the order (b) open the menu
26. 26.True or false: a wireframe looks like the real app. (a) True (b) False
27. 27.♿ Our rule: text is at least 16 px. How many texts on this screen are too small?
    Menu: 16 px
    Footer: 22 px
    Caption: 13 px
28. 28.Which of these is a user need? (a) a share button (b) a dark mode switch (c) “Small text is hard” (d) a reminder alarm
29. 29.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let lives = 45; // start at 44
    line 2: lives = lives + 2; // add 2
    line 3: lives = lives + 6; // add 6
    line 4: show(lives); // show it
30. 30.👆 Two designs for the same task (each arrow is one tap). Which needs FEWER taps?
    Design A: Home → Results → Size → Pay → Pens → Item
    Design B: Home → Shop → Cart → Item → Results → Menu → Pens (a) Design A (b) Design B
31. 31.💡 Does an app idea like a medicine reminder solve a real problem? (a) No (b) Yes
32. 32.🐞 This code has a bug. What number SHOULD it show, if every line did what its comment says?
    line 1: let score = 42; // start at 39
    line 2: score = score - 5; // take away 5
    line 3: score = score - 3; // take away 3
    line 4: score = score + 4; // add 4
    line 5: show(score); // show it
33. 33.🧩 How many inputs (text boxes, switches and sliders) does this screen have?
    [title] Edit Profile
    [text box] Email
    [button] Save
    [slider] Text size
    [switch] Dark mode
34. 34.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) a beep sound (d) typing your age
35. 35.🧪 What is the actual result of a test? (a) the app’s name (b) what the app really does (c) what we hope for (d) the test’s number
36. 36.🗒️ You are planning version 1 of a bus tracker. Which feature can WAIT for a later version? (a) pick your bus stop (b) see where the bus is (c) rate the driver (d) show arrival time
37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
38. 38.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
39. 39.🔍 Which is the odd one out? (a) a torch (b) a unit converter (c) a calculator (d) a puzzle with levels
40. 40.👆 The user taps the button 4 times. What does the label show now?
    let on = false;
    button.onTap = function () {
      on = !on;
      if (on) {
        label.text = "ON";
      } else {
        label.text = "OFF";
      }
    }; (a) ON (b) OFF

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